GB1275150A - Clamping and tool device - Google Patents

Abstract

1275150 Fusion welding J P PEYROT 31 Dec 1969 [31 Dec 1968] 63580/69 Headings B3B and B3R A device for clamping two cylindrical workpieces in coaxial relation and for welding, machining or checking the workpieces, comprises two pivotally related jaw members 13<SP>1</SP>, 14 adapted to be closed on to the workpiece by adjustable toggle clamping and release levers 16, 17, 19. Each member 13<SP>1</SP>, 14 is forked, the forks carrying work engaging members such as the pivotally mounted member 7, the adjustable abutment 5 and the resiliently mounted member 24. A C-shaped member 30 which carries the welding torch 28, e.g., for TIG welding, or alternatively a tool or checking device, is rotatably mounted by means of a set of rollers 40 on an axially adjustable slide 43 on the clamp body member 13 and is adapted to be driven through bearing from a variable speed electric motor 61. The C-shaped member 30 is provided with grooves for winding thereon conduits for the supply of arc shielding gas, cooling water and electricity. The gear transmission from the motor 61 to the C-shaped member may include a pulse generating device in the form of a small magnet mounted on one of the gears and arranged to close electrical contacts in a vacuum ampoule once for each rotation of the gear, the pulses generated being employed in connection with automatic weld control means. The welding torch is held at the desired spacing from the work surface by a roller 31 maintained in contact with the workpiece by a spring 32. The device may, as shown, be hand held and the clamping jaws closed manually or for heavier work the whole device may be bench mounted. The C-shaped member carrying the welding torch or tool may be disposed between the forks or to one side thereof. Reference is made to the device as used alternatively for electron beam welding, plasma arc welding, ultrasonic testing, machining, polishing and brushing.